1. ECE 477 Design Review Group 6  Fall 2005
Project G.N.O.M.E.
Marcus Funk
Logan Burns
Lindsey Hall
Nikhil Gahlawat

2. Outline Project overview Project-specific success criteria
Block diagram
Component selection rationale
Packaging design
Schematic and theory of operation
PCB layout
Software design/development status
Project completion timeline
Questions / discussion

3. Project Overview Project G.N.O.M.E. is a GPS-based navigational system
Guides the user/vehicle along a pre-stored route [on-board 32Mbit Flash IC].
Provides an LCD for displaying navigational information [e.g. current location, heading, and time].
Provides a Keypad [connected to LCD] for retrieving user input.
Provides audio directions based on stored-route and GPS data received.
Detects and notifies the user when veering off the pre-stored route.

4. Project-Specific Success Criteria
An ability to encode route information and store it in a non-volatile memory.
An ability to correlate real-time GPS data with stored route information [includes handling the “non-exact” nature of real time GPS data relative to stored waypoints].
An ability to decode [look-up] “actions” and display them on an LCD based on correlation between GPS data and stored route information.
An ability to generate audible commands based on decoded “actions.”
An ability to detect variance from the stored route [e.g. “you missed the last turn”] and suggest an alternate route [e.g. “take the next right, then right, then left”]

5. Block Diagram
FLASH
GPS
AUDIO
LCD/Keypad

6. Component Selection Rationale
Microcontroller selection criteria:
SPI for external flash memory
SCI for GPS receiver unit
16 I/O pins for audio record/playback device
16 additional I/O pins to interface with parallel to USB converter
Clock speed – fast enough to complete required calculations between GPS updates
GPS updates ~ 1Hz
Availability
Selected Microcontroller - Freescale MC9S12C QFP

7. Packaging Design Packaging Size: 2”(H) x 7”(W) x 7”(D)
Standard car audio bay
Features:
Backlit LCD Screen
6-Button Keypad Interface
Speaker Vents for audio
Weight: (approx) 3 lbs

8. Schematic/Theory of Operation
Microcontroller

9. Schematic/Theory of Operation
GPS Interface

10. Schematic/Theory of Operation
LCD/Keypad Interface

11. Schematic/Theory of Operation
Logic Level Converters
Serial FLASH

12. Schematic/Theory of Operation
Audio I/O

13. Schematic/Theory of Operation
Bypass Capacitors

14. Schematic/Theory of Operation
Reset, BKGD
PLL
Clock Oscillator

15. PCB Layout

16. PCB Layout
Microcontroller

17. PCB Layout
GPS

18. PCB Layout
LCD/Keypad

19. PCB Layout
Flash Memory

20. PCB Layout
Audio

21. Software Design/Development Status
Development board up and running
Demonstration program completed and working
Software flow-chart underway for entire system
Software under development for LCD/Keypad Interface
Software development to progress as additional components are prototyped and tested

22. Project Completion Timeline
Date
Completion Date
Sunday, October 16
- Website Completed
Thursday, October 20
- Final Schematic/PCB Layout Changes & Parts Acquisition
Thursday, October 27
- Component Prototyping/Testing Completed
- Patent Liability Analysis Completed/Submitted
Begin testing PCB, mounting components
Thursday, November 3
- Safety & Reliability Analysis Completed/Submitted
Thursday, November 10
- Major Software Modules Completed
- Software Narrative Completed/Submitted
- Final Software development/Testing Begun
- PCB Tested & All Components Mounted/Soldered
- Final Hardware development Begun
Thursday, November 17
- Environmental Analysis Completed/Submitted
Thursday, November 24
THANKSGIVING DAY
Nov 28 – Dec 9
- Final Testing/Debugging - Project Demonstration
- User Manual Due (Dec 1)
Dec 14
Project Completed/Reports Submitted/

23. Questions / Discussion